MCQ – 73290

Ans-A. Lacunar infarct

This image shows a CT scan of a lacunar infarct.

Occlusion of a larger perforating vessel causes a lacunar infarct.

Acutely, lacunar infarcts are often rounded with a hazy outline and may fluctuate in size in the subacute phase— most often enlarging.

When mature, however, they become sharply delineated, shrink in size—typically less than 1.5 cm diameter—and cavity-like.

The gliotic hyperintense rim of a mature lacune on FLAIR differentiates it from a perivascular space.

IOC for Hyperacute Infarct → MRIbest sequence –DWI

Acute/hyperacute infarcts show restricted diffusion.